When a passerby foils a crime, his reluctance to be recognized publicly masks a violent secret past. Guest stars: Richard Hardacre and Chris Wiggins.

An unfaithful wife and a seedy detective lead Giambone and O'Brien to the killer of a suspected embezzler.

An ex-con living in a residential halfway house is accused of murder. Guest stars: John Wildman, Dixie Seatle. With Scott Hylands and Jeff Wincott.

Lt. Hogan and O'Brien (Sean McCann, Scott Hylands) resume their investigation of a 7-year-old bank robbery case. Guest star: Lane Colman. With Allan Royal.

Giambone believes someone with a score to settle shot a veteran officer during a routine domestic-violence call.

A sailor's murder puts Giambone and O'Brien (Jeff Wincott, Scott Hylands) on the trail of an escaped felon. Guest stars: Robin Ward, August Schellenberg.

Stevie (Louise Vallance) falls for a married restaurateur who is a suspect in a stolen-goods ring. Guest star: Stephen Mendel. With Jeff Wincott and Scott Hylands.

Giambone goes undercover as an aspiring fighter to investigate the drug-related death of a professional boxer.

A guilt-ridden O'Brien (Scott Hylands) pursues a crazed killer (Winston Rekert) whom he once surrendered to the justice system. With Jeff Wincott.

O'Brien and Giambone investigate the shooting of teenagers who took a joy ride in a terrorist's car filled with weapons.

Giambone and O'Brien follow a cat burglar whose theft of a call girl's diary worries several city officials.

The killing of an innocent bar patron instead of an undercover narcotics agent exposes a web of double dealing.

O`Brien takes mugging victim Nicole to his apartment, unaware that her assailants have found his address in her purse.

Thugs stalk a runaway girl who witnessed a deal between a crooked union boss and a special prosecutor.

An ex-con who was sexually assaulted in prison stalks members of the city's gay community. Guest stars: Steve Marshall and Patrick Young. With Jeff Wincott, Scott Hylands and Stephen Mendel.

Kirkwood happens on a serial killer when he goes undercover as a derelict to research a story on the homeless.

A pretty museum curator helps investigate an art theft that occurs when a mystery man causes a disturbance.

An ex-con and his sister (Timothy Van Patten, Jessica Steen) recruit young people to fight crime in their neighbourhood. With Allan Royal, Scott Hylands and Jeff Wincott.

O'Brien and Giambone investigate the death of a young wife who is killed when her airport limousine is sabotaged.

O'Brien and Giambone are torn between duty and justice while investigating the stabbing death of a fascist group's leader.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) investigate the murder of a fashion designer's assistant. Guest stars: Maury Chaykin, Susan Henley.

A security guard (David Ferry) hitches a ride with a group of drug smugglers. Guest stars: Suzanne Coy, Clark Johnson. With Scott Hylands and Jeff Wincott.

Investigation of an illegal alien's death propels O'Brien and Giambone into the politics of a Caribbean nation.

O'Brien risks his career and his relationship with Nicole when he becomes entangled with a murder suspect.

O'Brien, Giambone and Kirkwood investigate the murders of the trainer and jockey of a prize racehorse.

Colby and Carson are the subject of a department investigation. Guest star: Leslie Toth. With Scott Hylands and Jeff Wincott.

O'Brien and Giambone investigate the death of a star college hockey player who had ties to a gambling ring.

An unbalanced woman from O'Brien's past makes an attempt on his life and injures Nicole in the process.

The death of a young model leads O'Brien, Giambone and Kirkwood to a top model embroiled in blackmail.

During a radio interview, Hogan (Sean McCann) is challenged by a murderer he previously arrested. Guest stars: Alan Scarfe and Frank Moore. With Scott Hylands and Jeff Wincott.

A woman's mysterious death sends O'Brien and Giambone to investigate her adopted child's birth mother.

O'Brien (Scott Hylands) believes that an off-duty police officer (Jason Miller) helped a drug-case suspect escape. Guest star: Cynthia Dale. With Jeff Wincott.

An abused wife (Carol Lynley) comes to Kirkwood for help; O'Brien and Giambone search for a pimp's killer.

A member (Lee Montgomery) of a youth league basketball team is implicated in a street gang murder. Guest star: Hector Elizondo. With Jeff Wincott and Scott Hylands.

The reappearance of his first partner's killer rekindles O'Brien's memories and renews his determination to capture the man.

A neighbourhood's inhabitants are hesitant to reveal to the police what they know about a young girl's murder.

A lounge singer is seen arguing with his cousin over money. The cousin is later found murdered. Does the lounge singer have ties to the mafia? O'Brien and Giambone seek the cooperation of a frightened singer (Danny Aiello) blackmailed by the mob.

The enraged father of a runaway who turned to prostitution is accused of murdering her pimp.

Whitey's cousin becomes a murder suspect when the limousine he drives appears to be connected with several deaths.

Sympathy for the man's family makes Giambone reject suicide as the cause of a failing industrialist's death.

An eager TV newswoman (Cynthia Belleveau) puts her life in danger when she reports on a crime family's activities. With Scott Hylands and Jeff Wincott.

O'Brien and Giambone enter the world of child pornography while seeking a runaway whose father was killed searching for her.

A rape victim learns that her assailant has been released from prison after serving only four years of his sentence.

A young astronomer sees a homicide through her telescope, but her frightened mother will not let her testify.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) uncover a drug-smuggling ring that uses innocent senior citizens as couriers. Guest stars: Kay Tremblay and Cec Linder.

When a mobster decides to testify against his boss, O'Brien and Giambone grudgingly agree to protect the informant.

Kirkwood's old friend, a presumed-dead rebel leader in South America, wants everyone to know he is alive.

Giambone and O'Brien (Jeff Wincott, Scott Hylands) are faced with a drug war after a narcotics dealer is slain. Guest star: Dean Richards.

A young woman leads O'Brien and Giambone (Scott Hylands, Jeff Wincott) to a hit man who plans to assassinate the deputy mayor.

Giambone and O'Brien are assigned to investigate several murders after Kirkwood's friend gets involved with the Chinese underworld.

When a junkie who attempts to rob the bar is killed by an irate patron, Nicole hides the real facts from O'Brien.

Vociferous animal rights activists raid a research laboratory and steal monkeys to use in a propaganda campaign.

Whitey and his girlfriend become mob targets after he witnesses a murder during his pickup of stolen merchandise. Whitey and his girlfriend are forced to enter the witness protection program.

O'Brien (Scott Hylands) must re-evaluate his relationship with Nicole (Susan Hogan) when she becomes pregnant. Guest star: Elias Zarou. In addition, O'Brien and Giambone investigate a gruesome assault tied to a crooked restaurant owner who is indebted to a dying loanshark. With Jeff Wincott.

When Lt. Hogan is shot during a holdup, O'Brien and Giambone must rally behind the unfamiliar lead of a beautiful temporary commander to catch the assailants.

A young woman confesses to Father Torres that she witnessed her brother kill a friend over a disagreement during a mugging.

Carson (Stephen Mendel) feels responsible when Colby (Eugene A. Clark) is shot while investigating a robbery. With Scott Hylands and Jeff Wincott.

O'Brien and Giambone investigate the deaths of six illegal aliens who died in a shipping container trying to enter the country. Both are convinced another 'shipment' is on the way.

While investigating an unusual death, Kevin and Frank become curious about a wealthy family's effort to keep their dead father's memory alive. Frank is pursued by payroll because of his mounting debt.

A Columbian detective helps the precinct apprehend members of a drug ring when several people are killed by a lone gunman during a cocaine operation.

A priest helps the police find the hit-and-run driver who killed a young woman. Meanwhile, a women visits Lt. Hogan and claims to be his daughter.

Kevin and Frank investigate when a real estate fraud sends a psychopath on a killing spree.

A man attempts to protect his wife after she witnesses the murder of a drug dealer.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) investigate when members of a jazz band are killed one by one. Guest stars: Paul Benjamin, James Purcell.

O'Brien and Giambone investigate the murder of a health club co-owner and confront a powerful loan shark.

After a jewelry robbery goes awry and an injury inhibits O'Brien, the prime suspect fabricates charges against Giambone.

O'Brien is consumed with guilt when he fails to prevent a suicide; Giambone pursues murderous thieves.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) must prevent the assassination of an Italian organized crime prosecutor (Hrant Alianak).

A police academy classmate of Giambone (Jeff Wincott) is investigated by a review board. Guest stars: Frank Pellegrino, Barbara Barnes-Hopkins. With Scott Hylands.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) become involved when Nicole's (Susan Hogan) mother (Frances Hyland) is attacked by a group of skinheads.

Elaine (Deborah Grover) reluctantly becomes a decoy for a serial killer. With Scott Hylands and Jeff Wincott.

The officers of Mid-South are reminiscing about their time together. After working together for years they now face the possibility of being sent to different precincts. Kirkwood proposes a feature article to raise awareness and prevent the closure.